Nonexplosive pypotechnic composition



Patented Sept. 27, 1938 I UNITED STATES PATENT OFFICE I i gl mo coMrosi-George finale, liover, N. .I.

No Drawing. Application April 10, 1936, Serial No. 73,768

' (Grahams the act ot March- 3, last. as

amended sun so, 1928; 370 o. G. my

'I'he invention described herein maybe nianuwhich include amongothers,sodium, potassium, factured and used by or for the Government for bariumand strontium, produce gas and intensify governmental purposes, withoutthe payment to the light.

me of any royalty thereon. Examples of non-explosive pyrotechnic compo-6 This invention relates to a non-explosive pyrositions prepared inaccordance with the invention technic composition. herein set forth areas follows, the proportions One or the disadvantages of the variouscombeing by weight: positions in general use for pyr teehniepurpo s Percent is the explosion hazard which exists in the manu- 1. Iron oxide 55l facture and use of such materials. This explo- Magnesium 30 1o sionhazardis largely due to the fact that the Barium nitrate materials whenmixed are sensitive to shock and Sulphur 5 g i izg the ordinary droptests without 2. Barium chromate 68-70 Magnesium 25-27 While it has beensuggested that pyrotechnic sodium nitmfp 3 l6 compositions be made ofingredients which, upon Linseed n" 2 combustion, produce solids insteadof gases, such compositions have not come into general use for rontiumchromate 53 the reason that they alone do not make a satis- I Magnesium40 iactory pyrotechnic composition but must have Strontium nitrate 5 '0incorporated with them a gaseous forming sub- Castor oil 2 :tgggxhichbrin s the mixtu e wit n t e la Potassium bmhmmate 30 The presentinvention resides in the fact that figggg fi gaseous forming substancesmay be mixed with strontium resinate 25 substances which upon combustionunite to form r solids to form efflcient and satisfactory pyro- As maybe readily Seen from t examples g ve technic compositions for longburning signal above a binder y be used with e mixtures lights f highcandle power hi maintaining when deemed necessary or desirable. thenon-explosive character of the composition. D- tests have Shown thatwhen more t so In carrying out the invention amixture is preby We of thegas producing element 0 pared which consists; first, of an oxide or achroe ements is present in the mixture they e e mate or both as theoxidizing component of the p T test i the u u l o f j tin mixture,second, of one or more metals which are a specimen f e u e t the blowdelivered adapted to react with the oxides and chromates y 2 Weightfalling ly from a te to form solid compounds, third, of 9. light inheiht. tensifler which yields gas upon combustion. I c aim! Thesesubstances are so proportioned that the gas A pyrotechnic compositionincluding a metallic yielding substance or substances will not exceedoxidizing agent selected from the class consisting 40 twenty-fivepercent by weight of the whole. of chromates and oxides, a metallic fueladapted Upon reaction of the ingredients mentioned in to react with theoxidizing agent to form a solid, the last paragraph the oxygen as givenofi by the and a gas-forming and light-intensifying alkali oxides orchromates combines with the metal or alkaline earth compound selectedfrom the magnesium to form a solid, while the constituents classconsisting of nitrates, and resinates, in an selected from the compoundsof the alkali'or amount less than twenty-five per cent of the alkalineearth elements of Groups I and II of whole. the Periodic Table ofchemical elements and 1 GEORGE C. HALE.

